The door closed just as I reached it and I pushed my way through. We were now in a back hallway, some sort of service area, nobody but the two of us. This was probably how he’d brought the unsanctioned painting into the museum. Heath was at the end of the corridor, about to round the corner. “Wait,” I said.

He stopped. “You’re not supposed to follow me.”

“Who are you?”

He turned but looked ready to bolt, so I stayed where I was, not wanting to spook him. His hands were shaking so much that I could see them moving even though forty feet separated us. I took him in from head to toe, trying to find some sort of clue. But his tux was generic and his shoes, standard dress shoes. He was even wearing gloves.

I took a slow step forward. “I liked your painting. It was amazing.”

“Thank you.” He glanced to the side, his escape route.

“I won’t tell anyone who you are. I’ll keep it to myself.”

“That’s not how it works.”

“How what works?” I pointed back toward the door we had both come through. “They know who you are. How come I can’t?”

He wouldn’t meet my eyes.

“If you can’t tell me who you are, at least promise me this.”

He gave a small nod.

“Please stay away from the swim meets from now on.”

He gave another nod, bigger this time, then he took off. I ran after him but by the time I rounded the corner he was gone. The hallway split into two and there was no trace of him. I clenched my fists in frustration, a jolt of pain radiating through my shoulder as I did. I cringed and massaged it away. Not bothering to put my shoes back on, I made my way back to Amelia.

She was typing furiously into her phone.

“What are you doing?”

“Recording who was here before I forget. There were so many people. I swear it was nearly my entire list. This is really going to help us narrow it down.”

“Did you happen to see Brad McCall or Leo Morales?” I asked, remembering the names that had been whispered behind me earlier.

“Yes, actually.” She showed me her phone. “Already on my list. Why?”

I gave a frustrated sigh. “Nothing.”

“Where’d you disappear to?”

“I went after him.”

She stopped typing and looked up. “Did you catch him?”

“Sort of, but that stupid mask made it impossible to tell who he was.”

“That stupid mask was pretty awesome. I haven’t seen it in person before, only online. How do you even get a mask that realistic? That would cost a serious amount of money.”

I had forgotten she hadn’t seen the mask at the pool. “So our Heath Hall is rich?”

“Wouldn’t it be funny if it was Grant James wearing a Heath Hall mask?”